Statisticsl Testing And The Sign Test

Question 1

Why do we use statistical testing

Answer 1

Provides a way of determining whether differences between variables are statistically significant or occurred by chance

Question 2

What is the difference between a one and two-tailed test

Answer 2

One-tailed test= directional hypothesis
Two-tailed test= non-directional hypothesis

Question 3

What is the sign test

Answer 3

A statistical test used to analyse the difference in scores between related items

Question 4

What are 3 conditions for using a sign test

Answer 4

1. Need to be looking for a difference rather than a correlation
2. Use a repeated measures design
3. Nominal data

Question 5

What is probability

Answer 5

The likelihood that certain events occur

Question 6

What is the accepted level of probability in psychology

Answer 6

0.05

Question 7

What does the calculated value have to be to be significant

Answer 7

Equal to or lower than the critical value

Question 8

What does it mean if the researcher accepts the hypothesis

Answer 8

There is less than 5% probability that the results occurred by chance

Question 9

Why might a researcher adopt a significance level of 0.01

Answer 9

When researchers need to be more confident that results were not due to chance (drug trials)

Question 10

Which 3 pieces of information do you need to locate the critical value

Answer 10

1. The significance level desired
2. The number of participants in the investigation
3. Whether the hypothesis is directional (one-tailed) or non-directional (two-tailed)